Adams View Research Articles

Development of a multibody model for go-karts considering frame flexibility

AbstractThis study focuses on the optimization dynamics of racing go-karts, which is heavily influenced by the frame's stiffness. Lacking suspensions and differentials, go-karts rely on the frame stiffness for wheel balancing and skid prevention by lifting the inner rear wheel during turns. Utilizing a rigid-flexible model in MSC Software ADAMS View, validated by frame deformation measurements, this research integrates finite element analysis with multibody techniques. The model, leverages computer aided design files for frame geometry and employs finite element analysis for frame validation. It facilitates evaluating go-kart dynamics through simulations, aiding in maneuver testing and design optimization. This approach provides a comprehensive framework for advancing go-kart designs.

Fatigue Life and Stress Analysis of a Single Cylinder Four Stroke Crankshaft

This paper focuses on the optimization of a crankshaft using ANSYS software in terms of weight and strength. The initial designs of the crankshaft, piston, and connecting rod were created using SolidWorks. The force generated by the gas during the combustion process was calculated to be 12017 N. Next, the SolidWorks assembled system was imported into ADAMS View software for simulation, which revealed a time-variant force of the crankpin of 14049 N. The calculated value was verified with results obtained from analytical calculations, showing a deviation of 0.23%. Finite element analysis was done for the crankshaft using ANSYS transient structural after applying loadings and boundary conditions. The optimization process aimed to minimize the crankshaft's weight while maintaining its strength and durability. The results of the ANSYS simulations showed a weight reduction of 2.5% from the original 2.983 kg to 2.907 kg, while maintaining the required strength and durability. The optimized crankshaft was compared to its original design in terms of fatigue life, weights, and stresses. The maximum von Mises stress was reduced by 16%, shear stress by 3.5%, and deformation by 3.5%, which were validated through analytical calculations. The crankshaft analysis resulted in a significant increase in fatigue life, calculated to be infinite under the given conditions. To conclude, the objective to optimize the crankshaft for performance and efficiency was achieved, demonstrating a 2.5% weight reduction and substantial improvements in fatigue life and stress distribution, proving the effectiveness of ANSYS software for the design optimization process.

Probabilistic Analysis of Critical Speed Values of a Rotating Machine as a Function of the Change of Dynamic Parameters.

Real-world rotordynamic systems exhibit inherent uncertainties in manufacturing tolerances, material properties, and operating conditions. This study presents a Monte Carlo simulation approach using MSC Adams View and Adams Insight to investigate the impact of these uncertainties on the performance of a Laval/Jeffcott rotor model. Key uncertainties in bearing damping, bearing clearance, and mass imbalance were modeled with probabilistic distributions. The Monte Carlo analysis revealed the probabilistic nature of critical speeds, vibration amplitudes, and overall system stability. The findings highlight the importance of probabilistic methods in robust rotordynamic design and provide insights for establishing manufacturing tolerances and operational limits.

A Bionic Walking Wheel for Enhanced Trafficability in Paddy Fields with Muddy Soil.

To improve wheel trafficability in soft and muddy soils such as paddy fields, a bionic walking wheel is designed based on the structural morphology and movement mode of the feet of waders living in marshes and mudflats, similar to the muddy soil of paddy fields. The bionic walking wheel adopts the arrangement of double-row wheel legs and staggered arrays to imitate the walking posture of waders. The two legs move alternately, cooperate with each other, and improve the smoothness of movement. The cam inside the bionic walking wheel is used to control the movement mode of the feet. The flippers open before touching the ground to increase the contact area and reduce sinking, and the toes bend and grip the ground while touching the ground to increase traction. Multi-rigid-body dynamics software (Adams View 2020) is used to simulate the movement of the wheel during the wading process, and the movement coordination and interference between the wheel legs are analyzed. The simulation results show that there is no interference between the parts and that the movement smoothness is good. The interaction between the bionic walking wheel and muddy soil was analyzed via coupled EDEM-ADAMS simulation, and the simulation analysis and experiments were conducted and compared with those for a common paddy wheel. The results showed that the bionic walking wheel designed in this paper improved the drawbar pull by 113.56% compared with that of a common paddy wheel and had better anti-sinking performance. By analyzing the effect of toe grip on traction, it was found that the soil under the feet can be disturbed to provide greater traction when the toe is bent downward. This study provides a reference for improving the trafficability of walking mechanisms in soft and muddy soils, such as paddy fields.

Analysis and Design of Rear Twin Electric Powertrain Mounting System in E-Up Boost

Abstract The paper focuses on analyzing and designing a mounting system for the modified rear powertrain of the E-up Boost. The initial section delves into the theoretical aspects, specifically examining the differing sources of vibration between internal combustion engines and electric powertrains. Following this, the subsequent section presents an in-depth analysis of the powertrain mounting system using ADAMS View. After the analysis is carried out, a robust mounting system is designed and verified through structural analysis.

A comprehensive study of the effects of various design variables on the dynamic behavior and vibration characteristics of a front-loading washing machine

This paper presents the findings of a comprehensive study of the effects of various design variables on the dynamic behavior and vibration characteristics of a front-loading washing machine. A multibody dynamics model of the washing machine with a set of 9 key design variables is developed using the commercial multibody simulation software Adams View. The design variables are implemented to enable automated modifications of the dynamics model for certain parameters such as the geometric orientations of the springs and dampers in the washing machine. This dynamics model is employed to perform a series of numerical simulations by considering a range of parametric values for the design variables. Numerical convergence analysis is performed to ensure that the simulation solutions are converged. Using the simulation solutions, the time histories of displacements at select points of the washing machine during operation (from transient till steady-state motion) are analyzed to understand how the natural frequencies of the washing machine are affected by various design variables. Finally, a sensitivity analysis is carried out to determine the design variables that have the strongest impact on the dynamic behavior of the washing machine. Of all the design variables affecting the dynamic behavior of the washer model, the weight balancer mass density and the damping coefficient were found to have the strongest effect.

A robust control scheme for a 2PUS+RR parallel robot for ankle rehabilitation

AbstractThis paper presents a robust adaptive controller based on the backstepping technique using an extended state observer (ESO), implemented on a 2PUS+RR parallel robot, to minimize the trajectory tracking error. The proposed backstepping-ESO controller scheme is designed to compensate for the robot’s structured (parametric) and unstructured (nonlinear friction, external disturbances, and dynamics) uncertainties. The overall stability of the controller is guaranteed by the Lyapunov theory. Cosimulation in MATLAB-Simulink and ADAMS View is presented to validate the results of the ESO and backstepping controller implemented in the virtual and physical prototype. For the virtual prototype, it was determined that the system is stable in 2 s and presents a maximum absolute error of 3.5 × $10^{-6}$ m for the actuator position and 2.8 × $10^{-5}$ rad for mobile platform orientation. Regarding the physical robot, a maximum absolute error of 5 × $10^{-4}$ m for the actuator position and 0.0575 rad for the orientation of the robot mobile platform values do not represent a problem for ankle rehabilitation movements. Experimental results were also presented and compared with ankle motion to demonstrate that the applied control system meets the motion requirements of the ankle rehabilitator.

СОВМЕСТНОЕ МОДЕЛИРОВАНИЕ ДВИЖЕНИЯ ПАРАЛЛЕЛЬНОГО МАНИПУЛЯТОРА C ИСПОЛЬЗОВАНИЕМ ADAMS-MATLAB

The article presents the methods and results of the analysis of the movement of a modeling manipulator such as the Hugh-Stewart platform using Adams-Matlab in order to check and develop a possible trajectory of the working body. Application of Matlab Simulink for solving kinematics problems: determining the extension length of rods along a given trajectory of the movement of the working body. A feature of the Simulink application scheme is the export of physical and mechanical parameters of a solid model from Adams. Mutual integration of Matlab Simulink and Adams View evaluate the implementation of the possibility of implementing a kinematic, comprehensive and force analysis of the mechanism, taking into account its design features due to the use of an apparent prototype. The proposed method of joint modeling is presented in the form of a detailed description of the content of Simulink circuit blocks, their interaction in modeling, the exact mathematical apparatus and the conditions for implementing mutual thoroughness of the Matlab and Adams software packages. The technique was tested on the ascent from constructive platforms while moving along a sexual character such as a given trajectory. The results of a computational experiment are proposed and an analysis is made of the coordinate correspondence of the actual trajectory obtained as a result of modeling in joint simulation with the initial given trajectory for various types of motion.

ПРИМЕНЕНИЕ ИНТЕРФЕЙСА PYTHON-ADAMS ДЛЯ МОДЕЛИРОВАНИЯ РАБОТЫ ПЛАТФОРМЫ ГЬЮ-СТЮАРТА

The article presents a technique for modeling the operation of the parallel structure mechanism - the Hugh-Stewart robotic platform using a virtual prototype. The MSC Adams software package and the high-level general-purpose object-oriented programming language Python were used as modeling tools. The digital layout, which has the properties of a parameterized simulation model, is built in the MSC Adams software package. The Python programming language is used as an alternative to the Adams View internal command language for creating and iteratively modifying modeling objects in Adams. The proposed implementation of the Python-Adams interface in the form of special procedures and functions automates the execution of a computational experiment and allows solving the problem of optimizing structural elements and finding the optimal geometric design of the hexapod in accordance with the selected optimality criteria by conducting a series of experiments consisting in sequential multiple changes in geometric parameters, followed by simulation model and analysis of the results in order to find design options that meet the specified criteria. The technique was tested on the example of optimizing the diameter of the platform according to the criterion of minimizing the effort expended when moving along a given trajectory. The results of a computational experiment are also presented to determine the dynamic parameters (forces, moments of forces) in the structural elements when the platform moves along a complex trajectory, to identify undesirable positions in which peak loads occur.

Dynamic Analysis and Fabrication of Single Screw Conveyor Machine

The design and development of machine tools play a vital role in the current economic growth. It facilitates the reduction of manufacturing cost coping with a quickly changing business environment. During the design of the machine tool, the dynamic characteristics need to be calibrated for avoiding uncertainties. This paper investigates the design, dynamic characteristics, and development of a single screw conveyor machine which is used to blend waste plastic material with catalysts. The conveyor machine model is created based on the idea developed from filament extruder machine with Pro-E solid modelling software. Its multibody dynamic analysis was carried out for the selected operational requirements in the ADAMS View. It shows that when the conveyor screw operated above the velocity of 42 m/s, the deformation will occur at a maximum value of 4.23 mm. The rigid body dynamic was carried out in ANSYS to solve the performance forecasting problems at their design stage. The dynamic analysis results were suggested to improve the conveying machine and driving mechanisms design parameters.

Simulation of the structural and force parameters of a robotic platform using co-simulation

The paper presents the methodology and results of modeling the operation of the parallel mechanism - a 6-DOF robotic platform of the Stewart-Gough type. MSC Adams and Matlab software packages were used as modeling tools, as well as a general-purpose, high-level object-oriented programming language, Python. The digital layout, which has the properties of a parameterized simulation model, is built in the MSC Adams software package. The Python programming language is used as an alternative to the Adams View internal command language for creating and iteratively modifying modeling objects in Adams. Mutual integration of Matlab Simulink and Adams View provides the implementation of joint simulation and allows to perform kinematic, dynamic and force analysis of the mechanism, taking into account its design features through the use of a virtual prototype. Simulink provides the ability to import of physical and mechanical parameters of a solid model from Adams. The proposed implementation of the Python-Adams interface in the form of special procedures and functions automates the execution of a computational experiment and allows solving the problem of optimizing structural elements and finding the optimal geometric design of the platform in accordance with the selected optimality criteria. This is implemented through conducting a series of experiments consisting in sequential multiple changes in geometric parameters, followed by simulation model and analysis of the results in order to find design options that meet the specified criteria. The technique was tested on the example of one of the design versions of the platform when moving along several characteristic types of a given trajectory. The results of a computational experiment are presented and an analysis of the force characteristics during movement along a given trajectory is carried out.

Explanation of Robert Adams's View of the Theory of the Divine Commond and Ash'arites Divine Command

Explanation of Robert Adams's View of the Theory of the Divine Commond and Ash'arites Divine Command

Balancing and Simulation of a Double Crank-Rocker Engine Model for Optimum Reduction of Shaking Forces and Shaking Moments

In this paper, a new configuration of Crank-Rocker (CR) model has been proposed by duplicating its mechanism. The method has been implemented to overcome vibration problem on a single-piston Crank-Rocker engine caused by system unbalance. The new method suggests combining conventional method of adding counterweights to reduce shaking forces and eliminating the inertial moments on system by implementing the new layout. A dynamic study of the new model is presented, then the objective function is derived and implemented to perform the optimization process. Related design variables and system constraints are introduced to determine attached counterweights optimized characteristics. For results validation, the simulation, dynamic analysis, and optimization process were conducted using ADAMS VIEW® software. The output results were presented and discussed to verify the validity of the suggested method. It was noticed that the method was very effective and has managed to reduce the total shaking forces by about 91%, shaking moment by about 66%; and the driving torque by 27%.

THE DESIGN OF MOVEMENT OF THE ROBOT MODEL IN STRUCTURED ENVIRONMENT USING MSC ADAMS

In this work, the issue of kinematic analysis of the open kinematic chain of an industrial robot is discussed. The aim of the work lies in the kinematic analysis of the robot and the display of kinematic quantities in the work process. Transformation matrices of coordinate systems of individual members are determined for the solution by the matrix method. The direct method of kinematics using the MSC Adams View program is solved. The result is a graphical representation of the kinematic variables of the mechanical system of the end point of the effector and trajectory when moving in its working space.

A phenomenological model for chain transmissions efficiency

This work deals with the development of a simplified and time-efficient phenomenological model for chain transmissions efficiency. Firstly, a complete multibody model for a final transmission of a motorcycle is developed in MSC Adams View environment, and is properly validated in terms of efficiency with experimental tests on a real chain system. Results from multibody simulations are used to develop a new analytical model, that relates all the main operating and geometry parameters of the transmission system to the transmission efficiency with simple relations. In particular, the influence of the polygonal effect on system efficiency is investigated, finding a relationship with the angle of the sprockets pitch polygon.A new parameter, called chain tension efficiency, is introduced to model the distribution of losses within the system. A linear relationship between this parameter and the number of sprockets teeth and with the system efficiency was assumed and validated, with good results. In addition, the dependence of slack span tension from several parameters, like speed, torque and number of teeth of sprockets, is investigated. In particular, it is highly dependent on the chain peripheral speed, both for a centrifugal tension and for a further linear component of tension, which might be originated by friction between links.The presented simple model can describe the chain system dynamics with low computational effort, allowing the designer to use a smart tool to select the proper transmission parameters. Due to its computational efficiency, the model is also useful for real-time and hardware-in-the-loop simulations.

Analysis of the interaction of robots in decentralized multi-robot system for transport tasks during start of the movement

The article presents the analysis of the influence of control signal time delays on the start of movement of a distributed group of robots and on the implementation of their programmed trajectory. Static analysis was carried out in a distributed group of robots, which were imposed by constraint resulting from connecting the robots with a transport pallet. Then, dynamic analysis of loads occurring as a result of control signal delays in MSC Adams View software was performer.

MULTIBODY SYSTEMS AND SIMULATION IN MATLAB

Urgency of the research. Computer modeling changes the teaching methodology, the way of thinking and the possibilities of applications. It helps to move from external to internal properties and from individual to related properties. The development of the product is accelerated by experimenting with a computer model. Target setting. Kinematic analysis in Matlab and MSC Adams View. The aim is to investigate the rotation of individual members of the robotic system and to determine the spatial movement of the end effector. Actual scientific researches and issues analysis. MSC Adams represents dynamic simulators of virtual prototypes of mechanical systems. Virtual prototypes allow to model, analyze and optimize the future products and to examine their properties before building a real prototype. This approach is suitable for developing miniature mechatronic elements as well as complex systems. Uninvestigated parts of general matters defining. Virtual prototypes represent a suitable resource for testing of control and regulation procedures. The research objective. Compilation of a virtual prototype of a mechanical system that has all the decisive features and is computationally stable. The statement of basic materials. Virtual model is a mathematical representation of real-world structures, simulating all its physical properties virtually. Conclusions. The aim was to determine the kinematic properties and also to evaluate the influence of the parameters of the mechanism which influence these kinematic properties. The matrix method was used. The process of the solution consisted of determining the transformation matrices of the coordinate systems, the kinematic analysis of the industrial robot and the graphical representation of the effector handling space.

Analysis of a quarter car suspension system based on nonlinear shock absorber damping models

Shock absorber is a critical element of vehicle suspension system with nonlinear characteristics. In the present work, performance of vehicle characteristics was analysed by quarter car model to study the effect of shock absorber, on the basis of linear and nonlinear damping characteristics. In addition to linear and piecewise linear, polynomial damping characteristics were considered to address the nonlinear aspect of damping characteristics. The linear and nonlinear properties of the shock absorber were incorporated in a two degree of freedom quarter car suspension system. The modelling and simulation is carried out in Adams view environment and Matlab/Simulink. A bump road profile was used to excite the quarter car suspension models. The polynomial shock absorber model was validated using experimental data taken from established literature. Simulation was undertaken to study the dynamic performance in terms of sprung mass acceleration, body displacement, suspension deflection and unsprung mass acceleration. Experimental hysteresis characteristics data, taken from established literature, were also modelled in Adams view environment and the simulated results were used for validation purpose. The suspension system response incorporating shock absorber represented by nonlinear model, hysteresis model and piece wise linear model were provided in the result section for comparison. It was observed from quantitative comparisons that the RMS values for body acceleration and body displacement of the polynomial model matched fairly well with the results of experimental hysteresis response. It was concluded that in order to study the dynamic characteristics of the vehicle accurately, nonlinear behaviour of the damper is required to be captured properly. Therefore, the proposed polynomial shock absorber model can be a better option for vehicle dynamic analysis as compared to the complex hysteresis model.

Optimisation of gate location based on weld line in plastic injection moulding using computer-aided engineering, artificial neural network, and genetic algorithm

Shock absorber is a critical element of vehicle suspension system with nonlinear characteristics. In the present work, performance of vehicle characteristics was analysed by quarter car model to study the effect of shock absorber, on the basis of linear and nonlinear damping characteristics. In addition to linear and piecewise linear, polynomial damping characteristics were considered to address the nonlinear aspect of damping characteristics. The linear and nonlinear properties of the shock absorber were incorporated in a two degree of freedom quarter car suspension system. The modelling and simulation is carried out in Adams view environment and Matlab/Simulink. A bump road profile was used to excite the quarter car suspension models. The polynomial shock absorber model was validated using experimental data taken from established literature. Simulation was undertaken to study the dynamic performance in terms of sprung mass acceleration, body displacement, suspension deflection and unsprung mass acceleration. Experimental hysteresis characteristics data, taken from established literature, were also modelled in Adams view environment and the simulated results were used for validation purpose. The suspension system response incorporating shock absorber represented by nonlinear model, hysteresis model and piece wise linear model were provided in the result section for comparison. It was observed from quantitative comparisons that the RMS values for body acceleration and body displacement of the polynomial model matched fairly well with the results of experimental hysteresis response. It was concluded that in order to study the dynamic characteristics of the vehicle accurately, nonlinear behaviour of the damper is required to be captured properly. Therefore, the proposed polynomial shock absorber model can be a better option for vehicle dynamic analysis as compared to the complex hysteresis model.

Kinematics Analysis of the Crank Mechanism Conveyor Using MSC Adams

The aim of the thesis is the solution of kinematics analysis model of the conveyor with a crank mechanism. For solution is to use a graphical method for determining the kinematics parameters of the individual members of the mechanism. In part kinematics analysis is also used MSC Adams View program that is designed to address the problems of kinematics and dynamics of systems with more degrees of freedom. This program shows the displacement, velocity and acceleration and angular velocity and angular acceleration of members. Finally, the work presents the results with graphic display of parameters such as displacement, velocity and acceleration. Introductory chapters are devoted to general issues kinematics mechanisms and the following chapters are devoted to a particular model of the conveyor mechanism.